Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 27

Connecting the refrigerant lines
Torque for refrigerant lines
Type AWBT(-M)/ Line
AWBT(-M)-E-AC
221.C04 Liquid line
221.C06
Hot gas line
221.C08 Liquid line
221.C10
Hot gas line
221.C13
221.C16
Connection to the indoor unit
Fig. 24
Liquid line
C
Hot gas line
D
Note
The refrigerant lines of the indoor unit are filled with
nitrogen; positive pressure 1 to 2 bar (0.1 to 0.2 MPa).
(cont.)
6 mm
7
12 mm
7
10 mm
7
16 mm
7
1.
C D
3.
Connection to the
outdoor unit
⁷⁄₁₆ UNF
C
D
2.
2x
C
D
1. Undo the nuts from connections
(hot gas line) of the refrigerant lines.
D
Types 221.C04 and 221.C06:
Replace nuts with union nuts supplied (indoor unit):
UNF for liquid line
■
⅝
UNF for hot gas line
■
⅞
Connect supplied reducer with copper seal ring.
Types 221.C08 to 221.C16:
Slide the nuts onto the relevant refrigerant lines
from the outdoor unit.
!
Please note
Contamination (e.g. metal swarf) or moisture
in the refrigerant lines will cause the appli-
ance to malfunction.
Point the pipe openings downwards or tem-
porarily plug them.
Installation sequence
Torque in Nm
14 to 18
UNF 50 to 62
¾
UNF 33 to 42
⅝
UNF 63 to 77
⅞
C (liquid line) and
27